Author(s)

Jiajia Li

Corresponding Author

Jiajia Li

ABSTRACT

With the implementation of water ecological civilization construction, river and lake ecological recovery has gradually become an important proposition of river and lake protection in the new era and the new journey. On the basis that the change trend of runoff, water quality, biology, geomorphology, social economy and other factors of Sanggan River. The concept of river channel defunctionalization is proposed for the first time, the thesis establishes the evaluating standard system by analytic hierarchy process (AHP), comprehensively evaluates the river defunctionalization, and puts forward the river function restoration measures according to the degradation trend of river eco-environment: Maintain the river ecological base flow; Change the irrigation mode of farmland around the river, reasonable fertilization; Improve sewage treatment capacity, rational use of reclaimed water; Conserve water sources and maintain soil and water. The joint implementation of the above measures will provide technical support for the ecological recovery of the Sanggan River. The severity of the disablement of Sanggan River fully indicates that the development and utilization of water resources should pay attention to the holistic concept, prevent overexploitation, and pay attention to the protection of water ecological environment security. The development and utilization of water resources must be considered comprehensively, planned comprehensively and subject to the construction of water ecological civilization under the premise of ensuring the safety of ecological environment and sound river function.

KEYWORDS

Sanggan River, Defunctionalization, AHP, Influencing Factors, Countermeasures